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Need info about Black coating on Nitinol

I am interested in a chemical (non-thermal) method for producing non-reflective black coating onto nitinol surgical instruments - any ideas?

MIchael Auld
- St. Charles, Missouri
1999

1999

In my experience most nitinol comes out with a black finish after heat treating. The black finish is a heavy oxide layer. To get nitinol bright a long electropolish must be undertaken.

Is it possible to just leave the oxide coating on the instruments?

John Davis
- Berthoud, Colorado, USA

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